Distribution of the tropical Pacific surface zonal wind anomaly and its relation with two types of El Nio

IOCAS-IR

	Distribution of the tropical Pacific surface zonal wind anomaly and its relation with two types of El Nio
	Wang Y(汪洋); Chen JN(陈锦年); Wang HN(王宏娜)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2013-09-15
出版年	2013
卷号	v.31 期号:05 页码:205-220
文献类型	CNKI期刊论文
摘要	El Nio events with an eastern Pacific pattern(EP) and central Pacific pattern(CP) were first separated using rotated empirical orthogonal functions(REOF).Lead/lag regression and rotated singular value decomposition(RSVD) analyses were then carried out to study the relation between the surface zonal wind(SZW) anomalies and sea surface temperature(SST) anomalies in the tropical Pacific.A possible physical process for the CP El Ni o was proposed.For the EP El Ni o,strong westerly anomalies that spread eastward continuously produce an anomalous ocean zonal convergence zone(ZCZ) centered on about 165°W.This SZW anomaly pattern favors poleward and eastward Sverdrup transport at the equator.For the CP El Nio,westerly anomalies and the ZCZ are mainly confined to the western Pacific,and easterly anomalies blow in the eastern Pacific.This SZW anomaly pattern restrains poleward and eastward Sverdrup transport at the equator;however,there is an eastward Sverdrup transport at about 5°N,which favors the warming of the north-eastern tropical Pacific.It is found that the slowness of eastward propagation of subsurface warm water(partly from the downwelling caused by Ekman convergence and the ZCZ) is due to the slowdown of the undercurrent in the central basin,and vertical advection in the central Pacific may be important in the formation and disappearance of the CP El Nio.
关键词	surface zonal wind anomaly CP(central Pacific) El Ni o rotated empirical orthogonal function rotated singular value decomposition zonal convergence physical process
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A009;
CNKI专题名称	气象学;
分类号	P425
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the National Natural Science Foundation of China(Nos.41076010,41206017) ; the National Basic Research Program of China(973 Program)(No.2012CB417402)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/190743
专题	中国科学院海洋研究所
作者单位	1.InstituteofOceanology,ChineseAcademyofSciences 2.KeyLaboratoryofOceanCirculationandWaves,ChineseAcademyofSciences 3.UniversityofChineseAcademyofSciences
推荐引用方式 GB/T 7714	Wang Y,Chen JN,Wang HN. Distribution of the tropical Pacific surface zonal wind anomaly and its relation with two types of El Nio. 2013.